Sand-blast machine



1,476,619 I. M.'KEMP ET AL SAND BLAST MACHINE Dec. 4 1923,

Filed on, a, 1921 s Sheets-Sheetl I N VEN TOR.

I. M. KEMP ET AL SAND BLAST MACHINE Fi led Oct. 5. 1921 3 Sheets-Sheet 2 ATTORNEY.

Dec. 4,1923. 1,476,619

' l. M. KEMP. ET AL SAND BLAST MACHINE Filed Oct. 5, 1921 s Sheets-$heet 5 A TTORNEY.

Patented Dec. 4, 1923.

- UNITED STATES JPATENTT scenes.

ISAAC M. KEMP AND EDWARD C. WIEDERHQLD, F WILLIAMSPOR'I', MARYLAND.

, SAND-BLAST MACHINE.

Application filed October 5, 1921. Serial No. 505,584.

To all whom it may concern:

Be it known that we, Isaac M. KEMP and EDWARD C. WIEDERHOL'D, citizens of the United States, residing at W'illiamsport, in the county of l Vashington 'and State of Maryland, have invented certain new and useful Improvements in Sand-Blast Machines, of which the following is a specification.

This invention relates to improvements in sand blast apparatus of the class wherein a rotating barrel isemployed for containing the articles to be treated and against.

' which the abrading medium is thrown, preferably by an air blast, and has for one of its objects to improve the construction, and inand utility of devices of crease the eficiency this character..

Another object of the invention is'to provide a device of this character in which provision is made for repeatedly using the abrading element.

Another object of this invention is to provide a device of this character including an improved construction of nozzle device.

With these and other objects in view the invention consists in certain novel features of construction as hereinafter shown and described and then specifically pointed out in the claims, and in the drawings illustrative of the preferred embodiment of the invention.

Figurel' is a front elevation, partly in section, of the improved apparatus.

Fig. 2 is a vertical section on the line 22 of Fig. 1. 1

Fig. 3 is a side elevation with the return conductor detached.

' Fig. 4 is an enlarged sectional detail of the nozzle device.

'Fig. 5 is an enlarged sectional detail illustratingthe construction of the couplingbetween the body of the nozzle deviceand. the discharge nipple.

F ig.6 is a transverse section on the line 6-6 of Fig. 5/

The improved apparatus comprises a sup porting frame represented as a whole at 10 with three sides of its upper portion enclosed by imperforatewalls l1, and the top 12 likewise imperforate except fora/relatively large vertical flue, 13, for the dust generated by the operation of the device.

The fourth side of the frame opposite the provided with a suitable catch 16 at the edge opposite to the hinges. h

Disposed within thespace below thewalls 11 and door 14 is a hopper shaped receptacle 17 having a contracted discharge 18 communicating with a horizontal tubular member 19, the latter having a reduced inlet 20 at one end and with means at 21 for coupling a tubular conductor; 22 thereto,as shown. 1

Located between the walls 11 isan inclined floor 23 having perforations 24 in the lower portion, and terminating next to the bottom of the door 14, as shown in Fig. 2.

Attached to the outer face of one of the walls 11 is a bracket 25 having bearings 26 and 27 inthe upper and lower parts respectively to support'a main drive shaft 28 and a counter shaft 29. The shaft 28 extends through. an opening in theadjacent wall 11 and carries a sleeve or collar 30 having a relatively large flange 31, the sleeve and flange being located within the. casing formed by the walls 11, top 12 and door 14.

The. barrel for conta-inin the articles to be treated comprises a perforated cylinder including a body 32 one closed end 33 and the other end 34 provided with a central opening 35. The closed end 33 of the barrel is rigidly connected to the flange 31 as by clamp bolts so that the barrel rotates with the shaft 28. 1

The annular end or head 34 of the bar- .rel is formed with a relatively wide flange port is produced for the otherwise unsup ported end of thev barrehand without .0 structing the opening 35. w I Y Attached to the. interior of the barrel are a plurality of blades 41 which-operate as bafiie members, which throw the material from side to side in the drum and expose [everyside of each individual piece to; the

action of. the abrading element.

Extending from'the frame ineinbers' lO;

just below the loweredge of the door 14, are brackets '42 to support a receptacle 43 to receive the articles after'being treated in the. barrel. V i I he sy in 'r s l we o i e 'fie is,

perforated, as shown, and with an opening 7 in one side, as indicated at. 44 in Fig.9, and attached to the drum at the :sides of theopening and extending over the adja cent parts of the drum, are curved guide members 45 to receive a correspondingly curved plate 46 which thus serves as a sliding closure to the opening 44, as shown in Fig. 2. V 'l/Vhen-the contents of the drum are to be discharged, the drum is stopped in its r0 tary movement with the opening 44 at a} relatively'low point and the closures 14 and 46 opened, when the material will flow from the drum upon the inclined floor and thence into the receptacle 43.

The wall member 11 next to the end 34 of the drumis provided with a relatively large opening, indicated at 47, and bearing over this opening is a combined closure and nozzle support 7 48, the latter hingedly coupled to the'wall 11 as at 49 and provided with a suitable catch 50 to hold it in closed position.

The member 48 is provided with an intermediate aperture, and covering this aperture is a plate 51 having a plurality of curved slots, 52 through each of which clamp bolt 53 extends and is tapped into the closure member 48. By this means the plate 51 is-rotatively adjustable upon the closure member 48. v

Formed integral with the member 51 is a nozzle device comprising an inclined shell '54 with the inner end reduced and tapered,

as shown at 55; The shell 54 is enlarged v intermediate the ends as shown at 56 to form a gathering chamber, and leading into the chamber portion is a lateral branch 57. Fitting in the bore of the shell 54 at its outer part is a conductor tube 58 for the compressed air and to whose outer end the air conductor hose 59 is connected, the hose having a controlling valve 60 and pressure gage 61 of conventional form.

Connectediat its ends at 62 and 68 to the full force of the blast, wear outvery rapidly members 57 and 19' is a conductor tube 64.

Bearing upon the-tapered terminal 55 of the shell 54 of the nozzle device, is a correspondingly tapered sleeve or collar '65, and

fitting within the collar is a smaller tube 66 enlarged at the inner end as shown at 67 to form a stop flange to prevent its removal.

T heit'ape'red portion 55 of the shell is provided with obliquely. directed bayonet slots.

'68, while the sleeve member 65 is provided with inwardly directed studs or pins 69 to engage in thei'slo't's. "By this means} the r member 66'may be very quickly and readily 1 detached and replaced when worn.

The discharge tubes 66 being exposed to the and requirefrequent renewal, and the simply constructed device enables this renewal to i beeasily and quickly accomplished by re leasing the member 48 and swinging it into.

pered portion 55 of the shell, and in'the path of the hose member 64, the parts combining to produce an effectual blast nozzle whereby the abrading element is forcibly driven through the small tube 66 with great force and against the slowly revolving contents of the barrel.

The shell 54 is so constructed that the discharge member 66' points downwardly at about 45 degrees and laterally at about .85 degrees toward the front or, discharge side of the drum; By thismeans the abrading medium is thrown to the center of the barrel, and after its action on the material passes through the perforations in the barrel and falls upon the inclined floor 23 and through the perforations therein into the hopper 17 and is sucked therefrom through the. hose 64 and into the nozzle again where it is used over again, and so on so long as it possesses any life.

The curved slots 52 enable the nozzle device to be adjusted as required, to control the position of the discharge end of the tube 66.

The shafts 28 and 29' are provided with intermeshing gears 70 and 71', while the shaft 29 is also provided with operating pulleys 72 of the usual construction:

the barrel is accomplished.

The improved device is designed more particularly for subjecting relatively small metal castings to the action of a blastof an. abrading element, such-1 as sharp sand, for

By this means the necessary rotation of the purpose of burnishing them and re moving burrs and sharp corners, and to effectually clean such articles, and may be constructed of any size or capacity and of any suitable material.

The preferred embodiment of: the inVe'n- 'tion is disclosed in the drawings and set forth in the specification, but it will be understood that modifications within the scope of the claimed invention maybe made in the construction without departing from the principle of the invention or sacrificing any of its advantages. 2

Having thus described'the invention, what V i is claimed as new is K o 1. Ina sand blast apparatus a support ing casing, a screen drum within said cas-i ingandhaving one closedend and an annular outwardly directed flange-at the other end, saiddrum having a lateral opening, a

detachable clo'surejover said opening,.means" carried'by the casing and attaehed to the closed end of the drum for supporting the same for rotation, bearing rollers attached to the casing and engaging the annular flange of the drum near the upper line thereof, whereby the bearing rollers are maintained free from contact with the abrading element which may sift through the drum, and a nozzle device supported by said casing and extending through the open end of the drum.

2. In a sand blast apparatus, acasing having an opening in one of its end walls, a screen drum for an abrading element supported for rotation in said casing and having an opening in one end wall registering with the opening in the casing, a closure for said casing opening and having a transverse opening in turn, a closure for the opening of the last mentioned closure and having a plurality of segmental slots, clamp bolts engaging respectively in the closure of said casing opening and extending through said slots, and a nozzle device supported obliquely by the slotted closure and extending into the drum, whereby the direction of the discharge of the nozzle can be controlled and directed in plurality of directions.

3. In a sand blast apparatus, a casing having an opening in one of its end walls, a screen drum for an abrading element supported for rotation in said casing and having an opening in one end wall registering with the opening in the casing, a closure for said casing opening and having a transverse opening in turn, a closure for the opening of'the last mentioned closure, means for rotatively coupling said last mentioned closure to the closure of the casing opening, and a nozzle device supported obliquely to the rotative closure and extending into the drum, whereby the direction of the discharge of the nozzle can be directed vertically and obliquely.

4. In a sand blast apparatus, an enclosing casing having an opening through one of its end walls, a movable door for said casing opening and having a transverse opening in turn, a closure for the transverse opening of said door, a nozzle device carried by the closure for said door opening, a screen drum mounted for rotation in said casing and into which the discharge tip of said nozzle extends, and means for adjustably coupling said nozzle device to said closure to enable the direction of the discharge of the nozzle to be directed vertically and obliquely.

In testimony whereof, we aflix our signatures hereto.

ISAAC M. KEMP.

EDWARD C. 'WIEDERHOLD. 

